LG ATNH126ELFB Service Manual page 76

Troubleshooting CH03
Display
Title
code
Communication
03
Wired R/C
Check Point
1. Check the wire connection. (Open / Short) ¡ Repair the connection
2. Check the soldering state of connector. (Soldered poorly) ¡ Repair or Change the PCB.
3. Check the volt. Of main PCB power source. (DC 12V, DC 5V) ¡ Repair or Change the main PCB.
4. Check the installation of wired remote controller. (Noise interference) ¡ Adjust the state of installation
Cause of error
• Open / Short
• Wrong connection
Wired R/C
12V S GND 12V
12Vdc
V
Check the Volt.
Check point & Normal condition
• Connection of wire
• Main PCB Volt. DC12V
• Noise interference
Indoor Unit
S GND
12Vdc
V
Check the Volt.
Troubleshooting Guide
Service Manual 121